
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;

        }
        ul{
            font-size: 0;
        }
        li{
            width: 300px;
            height:  100px;
            font-size: 20px;
            text-align: center;
            display: inline-block;

        }
        li:nth-child(1)
        {
            background-color: red;

        }
          li:nth-child(2)
        {
            background-color: green;

        }
          li:nth-child(3)
        {
            background-color:yellow;

        }
        
        

    </style>
</head>
<body>
    <ul class="list">
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
    <h2>
        浮动布局
    </h2>
</body>
</html>